Convert PDF to PNG in Multi-thread mode using C# and .NET
Complete code
GitHubusing System;
using System.IO;
using System.Collections.Generic;
using System.Threading;
using SautinSoft;
namespace Sample
{
class Sample
{
static void Main(string[] args)
{
ConvertPdfToPngInThread();
}
public class TArgument
{
public string PdfFile { get; set; }
public int PageNumber { get; set; }
}
public static void ConvertPdfToPngInThread()
{
string pdfs = Path.GetFullPath(@"..\..\..");
string[] files = Directory.GetFiles(pdfs, "*.pdf");
List<Thread> threads = new List<Thread>();
for (int i = 0; i < files.Length; i++)
{
TArgument targ = new TArgument()
{
PdfFile = files[i],
PageNumber = 1
};
var t = new Thread((a) => ConvertToPng(a));
t.Start(targ);
threads.Add(t);
}
foreach (var thread in threads)
thread.Join();
Console.WriteLine("Done!");
}
public static void ConvertToPng(object targ)
{
TArgument targum = (TArgument)targ;
string pdfFile = targum.PdfFile;
int page = targum.PageNumber;
string pngFile = Path.GetFileNameWithoutExtension(pdfFile) + ".png";
// Get your free 30-day key here:
// https://sautinsoft.com/start-for-free/
SautinSoft.PdfFocus f = new SautinSoft.PdfFocus();
f.ImageOptions.ImageFormat = PdfFocus.CImageOptions.ImageFormats.Png;
f.ImageOptions.Dpi = 300;
f.OpenPdf(pdfFile);
bool done = false;
if (f.PageCount > 0)
{
if (page >= f.PageCount)
page = 1;
if (f.ToImage(pngFile, page) == 0)
done = true;
f.ClosePdf();
}
if (done)
{
Console.WriteLine("{0}\t - Done!", Path.GetFileName(pdfFile));
System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(pngFile) { UseShellExecute = true });
}
else
Console.WriteLine("{0}\t - Error!", Path.GetFileName(pdfFile));
}
}
}
Option Infer On
Imports Microsoft.VisualBasic
Imports System
Imports System.IO
Imports System.Collections.Generic
Imports System.Threading
Imports SautinSoft
Namespace Sample
Friend Class Sample
Shared Sub Main(ByVal args() As String)
ConvertPdfToPngInThread()
End Sub
Public Class TArgument
Public Property PdfFile() As String
Public Property PageNumber() As Integer
End Class
Public Shared Sub ConvertPdfToPngInThread()
Dim pdfs As String = Path.GetFullPath("..\..\..")
Dim files() As String = Directory.GetFiles(pdfs, "*.pdf")
Dim threads As New List(Of Thread)()
For i As Integer = 0 To files.Length - 1
Dim targ As New TArgument() With {
.PdfFile = files(i),
.PageNumber = 1
}
Dim t = New Thread(Sub(a) ConvertToPng(a))
t.Start(targ)
threads.Add(t)
Next i
For Each thread In threads
thread.Join()
Next thread
Console.WriteLine("Done!")
End Sub
Public Shared Sub ConvertToPng(ByVal targ As Object)
Dim targum As TArgument = DirectCast(targ, TArgument)
Dim pdfFile As String = targum.PdfFile
Dim page As Integer = targum.PageNumber
Dim pngFile As String = Path.GetFileNameWithoutExtension(pdfFile) & ".png"
' Get your free 30-day key here:
' https://sautinsoft.com/start-for-free/
Dim f As New SautinSoft.PdfFocus()
f.ImageOptions.ImageFormat = PdfFocus.CImageOptions.ImageFormats.Png
f.ImageOptions.Dpi = 300
f.OpenPdf(pdfFile)
Dim done As Boolean = False
If f.PageCount > 0 Then
If page >= f.PageCount Then
page = 1
End If
If f.ToImage(pngFile, page) = 0 Then
done = True
End If
f.ClosePdf()
End If
If done Then
Console.WriteLine("{0}" & vbTab & " - Done!", Path.GetFileName(pdfFile))
System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(pngFile) With {.UseShellExecute = True})
Else
Console.WriteLine("{0}" & vbTab & " - Error!", Path.GetFileName(pdfFile))
End If
End Sub
End Class
End Namespace
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